Book Cricket
five levels. flick it where they are not, or over them.
five levels on a paper cricket ground in a textbook: flick to hit, read the gaps, and go over the top if you dare
Where you flick is where it goes, how fast is whether it stays down, and when decides how clean: early pulls it left, late drags it right. In the air is six or caught.
Concepts: projectile, momentum.
An interactive you play with one thumb, on Wundr.